Nonskid device for footwear



Feb. l5, 1955 G. PoLlzzl NONSKID DEVICE FOR FOOTWEAR 2 Sheets-Sheet lFiled Oct. 25, 1952 /Nl/ENTOR GIACOMO Pouw 'By #Za AENTS.

Feb. 15, 1955 G. PoLlzzl NoNsKID DEVICE FOR FOOTWEAR 2 Sheets-Sheet 2Filed Oct. 25, 1952 [NVENTDK www nited States Patent O NoNsKm DEVICE EoRFOOTWEAR Giacomo Polizzi, Cuneo, Italy, assignor of two-thirds toEdoardo Brero and Giulio Ferrero, Turin, Italy Application October 25,1952, Serial No. 316,883 Claims priority, application Italy October 25,1951 2 Claims. (Cl. 36--64) This invention relates to an improvedantislipping device for boots and shoes, which may be quickly attachedto or removed from the boot, or shoe and which is adjustable so as tosuit various sizes of boots and shoes.

Devices of this kind are already known comprising two interlockingmembers, each of which has serrated or toothed anges forming thegripping surface and each of which also has anges at its free end toembrace the sole of the boot or shoe, together with a fastening devicefor holding the end flanges of the members in locking engagement withsaid sole.

The members of said known devices, however, are arranged and interlockedin such manner that the serrated edges of their anges are constantlyaligned with each other, whereby the possibility of their adjustment isreduced, and a certain relative movement in a transverse direction isstill allowed. The main object of this invention is to provide animproved antislipping device for boots and shoes, of the type described,with a rm engagement between the movable parts avoiding any undue playor movements during use, and characterised by a wide adjustment rangewhich cannot be obtained by the known devices.

The invention will now be described in detail with reference to theaccompanying drawings, wherein:

Figure 1 is a front elevation of the device,

Figure 2 is a top plan view thereof,

Figure 3 is a bottom plan view of the same,

Figure 4 is a side elevation of the device seen from the right-hand sideof Figure l.

Figures 5 and 6 are detail side views of the two menibers which comprisethe device.

Figure 7 is a front elevation of a modied embodiment.

Figure 8 is a plan view of the latter.

Figure 9 is a sectional view on line lX-IX of Fig. 7.

Figure 10 is a plan view of a detail of the modified device.

Figures 11 and 12 are front and side elevations of a tool for adjustingthe device shown in Figures 7 to 9.

Referring now to Figures 1 to 6, 1 and 2 denote the body portions of thetwo cooperating members of the device.

The body portion 1 of the first member is in the form of an elongatedplate of suitable metal, with downturned side portions 4 each providedwith serrations 6 forming the gripping surfaces of the device. Each ofthe side portions 4 is bent over a short portion 4a at right angles tothe body plate 1, followed by a short portion 4b parallel with thelatter whereby a pair of longitudinally opposed guides 3 are formedunderneath the plate 1, communicating with the channel formed betweenthe opposed side portions 4.

The body portion 2 of the second member is likewise in the form of anelongated metallic plate in the side edges of which rows of opposedteeth 8 are cut, and which is further provided with downwardly extendingside portions 5 disposed at right angles to the plate 2 and merging intoit substantially along a line passing through the roots of the teeth 8.

The side portions 5 of the second member are formed at their lower edgeswith rows of serrations 7.

Said second member is slidably mounted within the channel formed betweenthe side portions 4 of the tirst member, the upper surface of its bodyportion 2 being adjacent to the lower surface of the body portion 1 andthe opposed outer surfaces of the side portions 5 being ice 2 1 adjacentto the opposed inner surfaces of the side portions 4, while the guides 3accommodate the rows of teeth 8, whereby the disengagement of the twomembers can take place by their longitudinal displacement only.

Obviously, the height of the side portions 5 of the second member issuch that the sharp edges of the scrrations 6 and 7 are at the samelevel.

For interlocking the members of the device in a desired position to suitvarious sizes of boots and shoes, the first member carries secured at 11to the parts 4a of its side portions 4 two leaf springs provided neartheir free ends 9a with engaging teeth 9, which are each urged into aspace between two adjacent teeth 8 of the same row, and extend for thispurpose through an opening 12 cut in the parts 4a and 4b of each sideportion 4.

The end portions 9a form outwardly bent tongues which can be seized bythe finger, when the leaf springs should be bent outwardly fordisengaging the teeth 9 from the teeth 8 of the second member.

The body portions of the two members have their free ends turnedupwardly at right angles thereto.

The upturned end 13 of the body portion 2 of the second or inner memberforms two hooks 14; vthe Shanks of which extend upwardly approximatelythe thickness of the sole A, while the upper ends of the said hooksextend inwardly a short distance on the upper side of the sole, as shownin Figure l.

The upturned end 15 of the body portion 1 of the first, or outer memberhas a threaded opening formed therein, into which a set-screw 16 isscrewed, carrying at one end a hook 18 provided with two tips 19 foroverlapping the upper side of the sole, and a short lever 17 at itsother end for turning the set-screw 16.

With this arrangement, by screwing in the bolt 16 it is possible toforce the hook 18, 19 to its position on the sole end, whereby thedevice is rigidly held on the shoe by the hooks at each end whichembrace the opposite edges of the sole, after the device has beencoarsely adjusted by relative longitudinal displacement of the twomembers.

The upper surface of the body portion 2 of the second member has nearits free end an upraised portion 20, the surface of which is situated atthe same level as the upper surface of the body portion 1 of the firstmember, whereby the said two body portions lie parallel with the lowersole surface when the device is secured to the boot or shoe.

21 denotes a recess cut in the body portion 1 of the first member, whichreceives the upraised portion when the second member is fully retractedwithin the first member.

ln the modied embodiment of the device shown in Figures 7 to 10, the twomembers are each U-shaped in cross-section, and comprise body portions 1and 2 with downturned serrated side portions.

The second member is slidably mounted within the channel formed by thebody portion 1 and the side portions of the first member.

Rows of aligned bores 22 of the same pitch and diameter are cut in theside portions 4 and 5 of the two members.

23 denotes a fork-shaped member, the parallel legs 25, 26 of which areso spaced that the fork may extend throughout two sets of bores in thesaid side portions 4 and 5 after said bores have been brought intoalignment by longitudinally displacing the two members of the device.

Each of the legs 25, 26 of the fork-shaped member is formed with twoperipheral grooves 24 having an axial width equalling the thickness ofthe side portions 5 of the second member and being cut at distancesequalling the distance between the opposed inner surfaces of said sideportions 5, whereby after fitting the member 23 a relative longitudinaldisplacement can be effected in order to prevent the fork-shaped member23 from sliding out of the bores 22.

The sole edge engaging means are similar to those of the embodimentdescribed above with reference to Figures l to 6, with the differencethat the set-screw 16 is provided, instead of the'lever 17, with ahexagonal head 26, and can be turned by means of a tool shown in Figures11 and l2 in the form of a T-shaped plate, in which a hexagonal opening27 is provided.

The upstanding leg of the tool 25 has a tapered end 25a, which can beinserted between the intermediate part of the member 23 and the sideportion 1 for the purpose of assisting withdrawal of the member 23 afterthe set-screw 16 has been loosened for disengaging the device from thesole.

What I claim is:

1. An antislipping device for boots and shoes comprising twolongitudinally aligned relatively displaceable members provided withmeans for engaging the opposite side edges of the sole of a boot orshoe, and with means for interlocking said members in a predeterminedrela tive position, the rst of said members being U-shaped in crosssection and formed by an elongated plate with downturned serrated sideportions, the second of said members being also U-shaped in crosssection and formed by an elongated plate with downturned serrated sideportions slidably itted within the channel formed by the plate and sideportions of said rst member, said means for interlocking the two memberscomprising two longitudinal rows of aligned bores provided in the sideportions of the first member, two longitudinal rows of aligned boresprovided in the side portions of the second member disposed at the samelevel and having the same pitch as the bores of the first member, and aforkshaped bar having parallel legs extending through two sets ofaligned bores provided in the first and second member.

2. Device as claimed in claim 1, wherein the forkshaped bar is formedwith two peripheral grooves in each of its legs, said groove equallingin axial width the thickness of the side portions of said second orinner member, and being spaced by a distance equalling the spacingbetween the inner walls of said side portions.

References Cited in the file of this patent UNITED STATES PATENTS710,187 Downer Sept. 30, 1902 741,011 Cook Oct. 13, 1903 1,044,776 GraffNov. 19, 1912 FOREIGN PATENTS 80,868 Sweden July 3, 1934

